On Fri, Apr 22, 2011 at 04:49:19PM +1000, Chris Angelico wrote:
> On Fri, Apr 22, 2011 at 4:22 PM, harrismh777 <harrismh...@charter.net> wrote:
> > now we get this for input():
> >
> > raw_input("prompt>") --> string
>
> I would have to say that the 2.x behaviour of input() is a mistake
> that's being corrected in 3.x. With a simple name like input(), it
> should do something simple and straightforward - not eval() the
> expression.
>
> > to: a = eval(input("enter a number > "))
>
> Uhhhh.... NO. NO NO NO. What if someone enters "os.exit()" as their
> number? You shouldn't eval() unchecked user input!
>
> Chris Angelico
Right, there's no way to check you're getting a number, however using:
a = int(input('enter a number > ')) # use float() for floats
will raise an exception if it can't convert the string.
--
http://mail.python.org/mailman/listinfo/python-list
